Immoral Wife (2005)
A wife thinks that all her sexual perversions and promiscuity is all behind her when she got married. But a friend of her husband who comes over for a drink will prove her wrong.
Swinging
Love (2015)
A girlfriend reveals to her boyfriend that she cheated on him when she catches him screwing a girl at a party. They also attend a swinger’s party and have a threesome with their hot, young neighbor.
World of Sexual Fantasy (1976) aka Fantasm
Husbands play poker with their wives as bargaining chips. The stakes are more than just stripping.
Emotion (2011)
A wife is sexually unsatisfied and takes on a lover. Her husband seeks the help of a sensual woman to aid them with their sexual problem.
Friends with Benefits (2012)
Alex and Jessica pretend to be married to join a swinger’s club. Meanwhile, a husband in the club gets jealous because his wife is always screwing the same hot woman. From New Sensations
A Man and a Woman (1993)
A man evades a debt collector, so the debt collector sleeps in his house to wait for him and ends up screwing the man’s girlfriend.
Sex Games for Couples (1976) aka Fantaisies pour Couples – France
Two couples are cheating with each other’s spouses before having an official wife swap.
Official Wife Swap Parody (2010)
Couples exchange wives to live the other pair’s life, but unlike the tv show, swapping goes up to the bedroom.